251255267 has 4 divisors (see below), whose sum is σ = 252256536. Its totient is φ = 250254000.

The previous prime is 251255261. The next prime is 251255309. The reversal of 251255267 is 762552152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 251255267 - 2¹² = 251251171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251255261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500258 + ... + 500759.

It is an arithmetic number, because the mean of its divisors is an integer number (63064134).

Almost surely, 2^251255267 is an apocalyptic number.

251255267 is a deficient number, since it is larger than the sum of its proper divisors (1001269).

251255267 is a wasteful number, since it uses less digits than its factorization.

251255267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001268.

The product of its digits is 42000, while the sum is 35.

The square root of 251255267 is about 15851.0336256031. The cubic root of 251255267 is about 631.0131233965.

The spelling of 251255267 in words is "two hundred fifty-one million, two hundred fifty-five thousand, two hundred sixty-seven".